Nadun is a traditional festival of the Sanchuan Mangghuer (Tu) people. During this annual period, Mangghuer dance and perform to thank their deities for the harvest. About 40,000 Mangghuer from 70 villages perform Nadun on a village by village basis during a 63-day period from the seventh to ninth lunar months. The length of this festival, large number of participants, and exceptional mask performances make this festival unique. Nadun is held in southern Minhe Hui and Tu Autonomous County, Haidong Region, Qinghai Province, PR China. This illustrated booklet is in three languages--Mangghuer, Chinese, and English. It was produced by the Sanchuan Development Association.